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# Convexity Estimates for Nonlinear Elliptic Equations and Application to Free Boundary Problems Estimations De Convexité Pour

@inproceedings{Monneau2002ConvexityEF, title={Convexity Estimates for Nonlinear Elliptic Equations and Application to Free Boundary Problems Estimations De Convexit{\'e} Pour}, author={R{\'e}gis Monneau}, year={2002} }

- Published 2002

– We prove the convexity of the set which is delimited by the free boundary corresponding to a quasi-linear elliptic equation in a 2-dimensional convex domain. The method relies on the study of the curvature of the level lines at the points which realize the maximum of the normal derivative at a given level, for analytic solutions of fully nonlinear elliptic equations. The method also provides an estimate of the gradient in terms of the minimum of the (signed) curvature of the boundary of the… CONTINUE READING

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